Use a graphing calculator to solve the system. Express solutions with approximations to the nearest thousandth. 
x + y = 50.4x - y = 3
A. {(-2.947, 8.789)}
B. ?
C. {(4.746, -1.102)}
D. {(2.258, 2.097)}
Answer: C
Mathematics
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A recursion formula and the initial term(s) of a sequence are given. Write out the first five terms of the sequence.a1 = 4, an+1 = 
A. 4, 
, -4, - 
, 4
B. 4, - 
, -4, 
, 4
C. 4, - 
, 4, - 
, 4
D. -4, 
, 4, - 
, -4
Mathematics
Solve the initial value problem.
= -16sin 
, s '(0) = 7, s(0) = -2
A. s = sin 
+ 7t - 3
B. s = 4cos 
+ 7
C. s = sin 
+ 6t - 2
D. s = sin 
- 3
Mathematics
Determine ? in decimal degrees, 0° ? ? ? 90°. Round results to an appropriate number of significant digits.cot ? = 3.511
A. 15.1° B. 15.900° C. 15.08° D. 15.90°
Mathematics
Evaluate the second derivative of the function for the given value of x.f(x) = 
, x = 2
A. - 
B. 
C. - 
D. 
Mathematics